Friday, September18, 2020
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Marine Weather and Tides
Bloomfield, CA

Version 3.4
NOTICE
8/26/2020 The 7 day forecast is taking about 5 seconds to load but it will eventually load. NOAA is still working on it.
8/18/2020 NOAA continues to have trouble. Wind guest will occasionally be left off graphs. I am working with NOAA to resolve the issue.
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

Sunrise 6:54AMSunset 7:14PM Friday September 18, 2020 8:12 PM PDT (03:12 UTC) Moonrise 7:17AMMoonset 7:27PM Illumination 3% Phase: Waxing Crescent; Moon at 2 days in cycle
NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.
Marine Forecasts
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PZZ540 Coastal Waters From Point Arena To Point Reyes California Out To 10 Nm- 230 Pm Pdt Fri Sep 18 2020
.small craft advisory in effect from Saturday afternoon through Saturday evening...
Rest of today..W winds up to 10 kt. Wind waves 1 ft. Mixed swell W 2 to 4 ft at 9 seconds and S 2 to 3 ft at 10 seconds.
Tonight..NW winds 5 to 15 kt. Wind waves 1 ft. Mixed swell W 3 to 4 ft at 9 seconds and S around 2 ft at 10 seconds. Patchy dense fog.
Sat..NW winds 15 to 25 kt with gusts up to 30 kt. Wind waves 3 to 4 ft. W swell 3 to 5 ft at 8 seconds and S up to 2 ft at 10 seconds.
Sat night..NW winds 15 to 25 kt with gusts up to 30 kt. Wind waves 3 to 4 ft. NW swell 5 to 6 ft at 8 seconds.
Sun..NW winds 10 to 20 kt with gusts up to 25 kt. Wind waves 2 to 3 ft. W swell 3 to 5 ft at 7 seconds.
Sun night..NW winds 10 to 20 kt with gusts up to 25 kt. Wind waves 3 to 4 ft. NW swell 3 to 5 ft at 7 seconds.
Mon..NW winds 20 to 30 kt with gusts up to 35 kt. Wind waves 5 to 6 ft. NW swell 2 to 4 ft and sw up to 2 ft.
Tue..NW winds 5 to 15 kt. Wind waves 1 to 2 ft. NW swell 3 to 5 ft and sw around 2 ft.
PZZ500 230 Pm Pdt Fri Sep 18 2020
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Winds continue to be out of the northwest and light, but locally stronger gusts are forecast south of pigeon point, into the northern Monterey bay, and south of point sur along the big sur coast. Winds will forecast to increase late Saturday afternoon and into Saturday evening. Seas remain mixed with a shorter period northwest swell and a moderate period south to southwest swell.


7 Day Forecast for Marine Location Near Bloomfield, CA
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location: 38.36, -122.86     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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FXUS66 KMTR 190026 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 526 PM PDT Fri Sep 18 2020

SYNOPSIS. Near seasonable and mild conditions continue through the weekend. Temperatures look to cool slightly to start then next work week. The mid to late portion of the next week offers a steady warming and drying trend.

DISCUSSION. as of 02:23 PM PDT Friday . Cloud cover has remained intact though much of the late morning, but cleared behind a weak front. This front has been pushing inland from a low pressure along the coast of Oregon since last night. Surface winds have stayed weak with a few areas in the upper altitudes across North Bay seeing breezier conditions, around 20 mph gusts. Winds have also began to shift behind the front with more of a westerly flow, which is expected to remain into early evening. The trough to the north will continue to push inland with the center of the associated low crossing over Oregon tonight. Winds from the surface up to 850 mb are forecast to become more Northerly this evening and overnight. The shift in winds could limit the return of the marine layer tonight. The HRRR and the NAM are indicating a weak/shallow marine layer tonight while the EURO and the GFS are not showing significant development.

Saturday morning's compressed marine layer looks to reduce chances for patchy fog and drizzle. A compressed marine layer could allow for earlier marine layer mixing and slightly warmer conditions along the coast. The models are in good agreement that winds from the surface to 700 mb level will stay Northerly for most of the day heading into Sunday. Concerns from this track of wind include drier conditions in the afternoon and the possibility to pull smoke from the August Complex back into the region. Luckily, winds look to remain generally weak. Sunday looks to continue the pattern of drier conditions and temperatures rising at a gradual pace.

Into the next work week: There is some disagreement between models on the positioning of a slight trough on Monday. They do agree on some cooling, specifically for more interior areas. This looks to be short lived, as temperatures are set to rebound and warm at a steady pace for the second half of the work week as weak ridging transits the region.

Longer term models are showing another trough moving over the West Coast the weekend after this. The main disagreement is on the depth of the trough with the GFS offering a deeper, but more widespread gradient. Again this is more than 170 hours out and model output can change wildly in that time. This is something that we will be monitoring.

AVIATION. As of 05:25 PM PDT Friday . for 00Z TAFS. VFR throughout the terminals with clear skies over land and stratus redeveloping just off the coast. Strongest stratus push is into Monterey Bay area so cigs may cover KMRY by 01z. Otherwise, vis is good throughout the region and winds are breezy from WNW, with some locally stronger gusts. Expecting a return of the marine layer for IFR- MVFR cigs for tonight but it may take a while to redevelop.

Vicinity of KSFO . VFR, with stratus lingering offshore and pushing into coastal areas. Winds WNW 15-20 kt with some higher gusts. Borderline IFR- MVFR cigs developing overnight with timing uncertain. As of now, 05-06z is forecast for stratus. Winds easing overnight. Clearing skies by mid-morning and continued onshore flow tomorrow.

SFO Bridge Approach . Similar to SFO.

Monterey Bay Terminals . Currently VFR but stratus pushing towards KMRY, so may see early evening cig there. Otherwise IFR cigs redeveloping overnight for much of the area. Winds remain onshore and breezy with a few stronger gusts through the Salinas valley, but weakening overnight. Clearing expecting by late morning with continued onshore flow.

MARINE. as of 02:21 PM PDT Friday . Winds continue to be out of the northwest and light, but locally stronger gusts are forecast south of Pigeon Point, into the northern Monterey Bay, and south of Point Sur along the Big Sur coast. Winds will forecast to increase late Saturday afternoon and into Saturday evening. Seas remain mixed with a shorter period northwest swell and a moderate period south to southwest swell.

MTR WATCHES/WARNINGS/ADVISORIES. Tngt. SCA . Mry Bay until 9 PM SCA . Pigeon Pt to Pt Pinos 0-10 nm until 9 PM SCA . Pt Pinos to Pt Piedras Blancas 0-10 nm



PUBLIC FORECAST: Garcia/Murdock AVIATION: Lorber MARINE: DK

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46013 - Bodega Bay - 48NM North Northwest of San Francisco, CA 25 mi42 min WNW 7.8 G 9.7 60°F 58°F1015.2 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 38 mi54 min W 12 G 16 68°F 1014.1 hPa
RCMC1 - 9414863 - Richmond, CA 38 mi60 min WNW 8 G 13 68°F 66°F1014.4 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 39 mi43 min WSW 7 65°F 1015 hPa
46237 - San Francisco Bar, CA (142) 41 mi42 min 59°F4 ft
PPXC1 - 9414847 - Richmond (Point Potrero), CA 41 mi54 min SW 4.1 G 7 67°F 1015.2 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 42 mi42 min W 7.8 G 9.7 62°F1015.4 hPa
46214 - Point Reyes, CA (029) 43 mi46 min 62°F4 ft
FTPC1 - 9414290 - San Francisco, CA 44 mi54 min W 6 G 8.9 62°F 63°F1015.3 hPa
UPBC1 45 mi54 min WNW 19 G 22
MZXC1 - 9415102 - Martinez-Amorco CA 45 mi54 min W 14 G 17 68°F 69°F1014.2 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 46 mi54 min W 6 G 9.9 64°F 1013.9 hPa
PXSC1 46 mi54 min 66°F
SFXC1 - San Francisco Bay Reserve, CA 46 mi87 min WNW 19
OKXC1 - 9414776 - Oakland (Berth 34), CA 47 mi54 min W 13 G 16 64°F 1014.8 hPa
OBXC1 47 mi54 min 65°F 65°F
PCOC1 - 9415144 - Port Chicago, CA 48 mi54 min W 17 G 20 69°F 69°F1013.9 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 48 mi54 min W 14 G 20

Wind History for Point Reyes, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Santa Rosa, Santa Rosa Sonoma County Airport, CA11 mi79 minSW 810.00 miFair69°F59°F70%1013.6 hPa
Petaluma Municipal Airport, CA15 mi77 minWNW 6 G 1510.00 miOvercast66°F60°F83%1015.2 hPa
Novato / Gnoss Field, CA22 mi17 minVar 3 G 1210.00 miPartly Cloudy66°F60°F83%1014.6 hPa

Link to 5 minute data for KSTS

Wind History from STS (wind in knots)
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Last 24hrSE7SE4SE5SE3S3SE3S3CalmCalmW3W3CalmCalmCalmSW4S7W8SW11W13
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1 day agoSE5SE5S4CalmCalmSE3CalmW3CalmCalmCalmCalmCalmCalmE34S6S10SW9W11
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2 days agoSE5SE4CalmCalmCalmCalmNE3CalmCalmCalmCalmCalmCalmCalmSW433SW4SW5SW6SW6SW7S4SE6

Tide / Current Tables for Bodega Harbor entrance, California
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Bodega Harbor entrance
Click for Map
Fri -- 06:13 AM PDT     0.18 feet Low Tide
Fri -- 06:56 AM PDT     Sunrise
Fri -- 08:18 AM PDT     Moonrise
Fri -- 12:32 PM PDT     5.84 feet High Tide
Fri -- 06:37 PM PDT     0.68 feet Low Tide
Fri -- 07:14 PM PDT     Sunset
Fri -- 08:27 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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6.15.64.63.21.80.70.20.41.32.53.855.75.85.242.71.50.80.71.32.43.74.8

Tide / Current Tables for Tomales Bay Entrance, California
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Tomales Bay Entrance
Click for Map
Fri -- 12:15 AM PDT     5.51 feet High Tide
Fri -- 06:43 AM PDT     0.01 feet Low Tide
Fri -- 06:56 AM PDT     Sunrise
Fri -- 08:17 AM PDT     Moonrise
Fri -- 12:55 PM PDT     5.23 feet High Tide
Fri -- 07:06 PM PDT     0.47 feet Low Tide
Fri -- 07:14 PM PDT     Sunset
Fri -- 08:27 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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5.55.34.63.42.10.90.200.51.52.94.155.24.942.81.70.80.50.71.52.73.9

Weather Map
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wmap_P
GEOS Local Image of CentralWestCoast    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Ground Weather Radar Station Sacramento, CA
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The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerous of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.